东北大学学报（自然科学版）

东北大学学报（自然科学版） ›› 2021, Vol. 42 ›› Issue (2): 260-267.DOI: 10.12068/j.issn.1005-3026.2021.02.016

• 材料与冶金 • 上一篇    下一篇

氢系气体喷吹对烧结污染物释放的影响规律

周浩宇1,2， 范晓慧1， 李谦2， 甘敏1   

  1. (1. 中南大学 资源加工与生物工程学院， 湖南 长沙410083; 2. 中冶长天国际工程有限责任公司 国家烧结球团装备系统工程技术研究中心， 湖南 长沙410205)
  • 收稿日期:2020-07-02 修回日期:2020-07-02 接受日期:2020-07-02 发布日期:2021-03-05
  • 通讯作者: 周浩宇
  • 作者简介:周浩宇(1981-)，男，湖南长沙人，中南大学博士研究生，中冶长天国际工程有限责任公司高级工程师； 范晓慧(1969-)，女，河北昌黎人，中南大学教授，博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51974371)； 湖南省自然科学基金资助项目(2020JJ5994).

Effects of Hydrogen-Based Gas Injection on the Release of Typical Pollutants in the Sintering Process

ZHOU Hao-yu1,2， FAN Xiao-hui1， LI Qian2， GAN Min1   

  1. 1. School of Minerals Processing & Bioengineering， Central South University， Changsha 410083， China; 2. National Engineering Research Center of Sintering and Pelletizing Equipment System， Zhongye Changtian International Engineering Co.， Ltd.， Changsha 410205， China.
  • Received:2020-07-02 Revised:2020-07-02 Accepted:2020-07-02 Published:2021-03-05
  • Contact: FAN Xiao-hui
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摘要： 采用焦炉煤气和水蒸气作为氢系喷吹介质，研究了喷吹介质、喷吹方式、气体喷吹量等因素对烧结过程典型污染物释放规律的影响.结果表明，氢系气体喷吹使烧结料层温度分布明显改善，1200~1300℃的高温区间明显拓宽;喷吹0.6%(体积分数)的焦炉煤气后，烟气中的NO○x峰值质量浓度最高降低了约100mg/m3，平均质量浓度降低21.1%，这主要是由于燃气喷吹拓宽了有利于复合铁酸钙生成的温度区间，而蒸汽喷吹对CO的减排有明显效果.蒸汽喷吹后水蒸气与烧结原料中的碳发生水煤气反应，烧结烟气中的CO从11690mg/m3最低降至9918mg/m3，降幅达29.4%;烧结料表面同时喷吹焦炉煤气和水蒸气可以实现NO○x和CO的综合减排.

关键词: 烧结工序;燃气喷吹;蒸汽喷吹;CO减排;NO○x减排

Abstract: Coke oven gas and steam were used as the hydrogen-based injection media to analyze the effects of injection media， injection mode and the amount of gas injection on the release of typical pollutants in the sintering process. The results show that the temperature distribution of the sintering layer has obviously improved， with the high temperature range of 1200-1300℃ widened evidently， after the hydrogen-containing gas is injected. After the coke oven gas(0.6%Vol.) was injected on the sintering material surface， the peak concentration of NO○x in flue gas is reduced by about 100mg/m3， and the average concentration is reduced by 21.1%. This is mainly because the gas injection broadens the high temperature range of the material layer and the injection of steam on the sintering material surface has a significant effect on the reduction of CO emissions. After the steam is sprayed， the CO in the sintering flue gas is reduced from 11690mg/m3 to 9918mg/m3， a decrease of 29.4%. This is mainly because water vapor reacts with the carbon in the sintering raw material to produce water gas. The simultaneous injection of coke oven gas and water vapor on the sintering material surface can achieve a comprehensive reduction of NO○x and CO emissions.

Key words: sintering process; fuel gas injection; steam injection; carbon monoxide emission reduction; nitric oxide emission reduction

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